magnify.c

VLC Player Source Code

        fmt_in.i_width  = (fmt_in.i_width  * ZOOM_FACTOR / o_zoom) & ~1;
        fmt_in.i_height = (fmt_in.i_height * ZOOM_FACTOR / o_zoom) & ~1;

        /* */
        fmt_out = p_vout->fmt_out;

        p_converted = image_Convert( p_sys->p_image, &crop, &fmt_in, &fmt_out );

        picture_CopyPixels( p_outpic, p_converted );

        picture_Release( p_converted );
    }
    else
    {
        picture_CopyPixels( p_outpic, p_pic );
    }

    /* */
    p_oyp = &p_outpic->p[Y_PLANE];
    if( b_visible )
    {
        video_format_t fmt_out;

        /* image visualization */
        fmt_out = p_vout->fmt_out;
        fmt_out.i_width  = (p_vout->render.i_width/VIS_ZOOM ) & ~1;
        fmt_out.i_height = (p_vout->render.i_height/VIS_ZOOM) & ~1;
        p_converted = image_Convert( p_sys->p_image, p_pic,
                                     &p_pic->format, &fmt_out );
        for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
        {
            int y;
            for( y = 0; y < p_converted->p[i_plane].i_visible_lines; y++)
            {
                vlc_memcpy(
                    &p_outpic->p[i_plane].p_pixels[y*p_outpic->p[i_plane].i_pitch],
                    p_converted->p[i_plane].p_pixels+y*p_converted->p[i_plane].i_pitch,
                    p_converted->p[i_plane].i_visible_pitch );
            }
        }
        picture_Release( p_converted );

        /* white rectangle on visualization */
        v_w = __MIN( fmt_out.i_width  * ZOOM_FACTOR / o_zoom, fmt_out.i_width - 1 );
        v_h = __MIN( fmt_out.i_height * ZOOM_FACTOR / o_zoom, fmt_out.i_height - 1 );

        DrawRectangle( p_oyp->p_pixels, p_oyp->i_pitch,
                       p_oyp->i_pitch, p_oyp->i_lines,
                       o_x/VIS_ZOOM, o_y/VIS_ZOOM,
                       v_w, v_h );

        /* */
        v_h = fmt_out.i_height + 1;
    }
    else
    {
        v_h = 1;
    }

    /* print a small "VLC ZOOM" */
    if( b_visible || i_last_activity + p_sys->i_hide_timeout > mdate() )
        DrawZoomStatus( p_oyp->p_pixels, p_oyp->i_pitch, p_oyp->i_pitch, p_oyp->i_lines,
                        1, v_h, b_visible );

    if( b_visible )
    {
        int y;

        /* zoom gauge */
        vlc_memset( p_oyp->p_pixels + (v_h+9)*p_oyp->i_pitch, 0xff, 41 );
        for( y = v_h + 10; y < v_h + 90; y++ )
        {
            int width = v_h + 90 - y;
            width = (width*width)/160;
            if( (80 - y + v_h)*ZOOM_FACTOR/10 < o_zoom )
            {
                vlc_memset( p_oyp->p_pixels + y*p_oyp->i_pitch, 0xff, width );
            }
            else
            {
                p_oyp->p_pixels[y*p_oyp->i_pitch] = 0xff;
                p_oyp->p_pixels[y*p_oyp->i_pitch + width - 1] = 0xff;
            }
        }
    }

    vout_DisplayPicture( p_sys->p_vout, p_outpic );
}

static void DrawZoomStatus( uint8_t *pb_dst, int i_pitch, int i_width, int i_height,
                            int i_offset_x, int i_offset_y, bool b_visible )
{
    static const char *p_hide =
        "X   X X      XXXX   XXXXX  XXX   XXX  XX XX   X   X XXXXX XXXX  XXXXXL"
        "X   X X     X          X  X   X X   X X X X   X   X   X   X   X X    L"
        " X X  X     X         X   X   X X   X X   X   XXXXX   X   X   X XXXX L"
        " X X  X     X        X    X   X X   X X   X   X   X   X   X   X X    L"
        "  X   XXXXX  XXXX   XXXXX  XXX   XXX  X   X   X   X XXXXX XXXX  XXXXXL";
    static const char *p_show = 
        "X   X X      XXXX   XXXXX  XXX   XXX  XX XX    XXXX X   X  XXX  X   XL"
        "X   X X     X          X  X   X X   X X X X   X     X   X X   X X   XL"
        " X X  X     X         X   X   X X   X X   X    XXX  XXXXX X   X X X XL"
        " X X  X     X        X    X   X X   X X   X       X X   X X   X X X XL"
        "  X   XXXXX  XXXX   XXXXX  XXX   XXX  X   X   XXXX  X   X  XXX   X X L";
    const char *p_draw = b_visible ? p_hide : p_show;
    int i, y, x;

    for( i = 0, x = i_offset_x, y = i_offset_y; p_draw[i] != '\0'; i++ )
    {
        if( p_draw[i] == 'X' )
        {
            if( x < i_width && y < i_height )
                pb_dst[y*i_pitch + x] = 0xff;
            x++;
        }
        else if( p_draw[i] == ' ' )
        {
            x++;
        }
        else if( p_draw[i] == 'L' )
        {
            x = i_offset_x;
            y++;
        }
    }
}
static void DrawRectangle( uint8_t *pb_dst, int i_pitch, int i_width, int i_height,
                           int x, int y, int i_w, int i_h )
{
    int dy;

    if( x + i_w > i_width || y + i_h > i_height )
        return;

    /* top line */
    vlc_memset( &pb_dst[y * i_pitch + x], 0xff, i_w );

    /* left and right */
    for( dy = 1; dy < i_h-1; dy++ )
    {
        pb_dst[(y+dy) * i_pitch + x +     0] = 0xff;
        pb_dst[(y+dy) * i_pitch + x + i_w-1] = 0xff;
    }

    /* bottom line */
    vlc_memset( &pb_dst[(y+i_h-1) * i_pitch + x], 0xff, i_w );
}

/*****************************************************************************
 * SendEvents: forward mouse and keyboard events to the parent p_vout
 *****************************************************************************/
static int SendEvents( vlc_object_t *p_this, char const *psz_var,
                       vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
    VLC_UNUSED(p_this); VLC_UNUSED(oldval);
    var_Set( (vlc_object_t *)p_data, psz_var, newval );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * SendEventsToChild: forward events to the child/children vout
 *****************************************************************************/
static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
                       vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
    VLC_UNUSED(p_data); VLC_UNUSED(oldval);
    vout_thread_t *p_vout = (vout_thread_t *)p_this;
    var_Set( p_vout->p_sys->p_vout, psz_var, newval );
    return VLC_SUCCESS;
}

/*****************************************************************************
 * MouseEvent: callback for mouse events
 *****************************************************************************/
static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
                       vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
    vout_thread_t *p_vout = (vout_thread_t*)p_data;
    vlc_value_t vald,valx,valy;

    VLC_UNUSED(p_this);

#define MOUSE_DOWN    1
#define MOUSE_CLICKED 2
#define MOUSE_MOVE_X  4
#define MOUSE_MOVE_Y  8
#define MOUSE_MOVE    12
    uint8_t mouse= 0;

    if( psz_var[6] == 'x' ) mouse |= MOUSE_MOVE_X;
    if( psz_var[6] == 'y' ) mouse |= MOUSE_MOVE_Y;
    if( psz_var[6] == 'c' ) mouse |= MOUSE_CLICKED;

    var_Get( p_vout->p_sys->p_vout, "mouse-button-down", &vald );
    if( vald.i_int & 0x1 ) mouse |= MOUSE_DOWN;
    var_Get( p_vout->p_sys->p_vout, "mouse-y", &valy );
    var_Get( p_vout->p_sys->p_vout, "mouse-x", &valx );

    vlc_mutex_lock( &p_vout->p_sys->lock );

    const int v_h = p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom;
    const int v_w = p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom;

    if( ( mouse&MOUSE_MOVE && mouse&MOUSE_DOWN)
        || mouse&MOUSE_CLICKED )
    {
    /* (mouse moved and mouse button is down) or (mouse clicked) */
        if( p_vout->p_sys->b_visible )
        {
            if(    0 <= valy.i_int
                && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM
                && 0 <= valx.i_int
                && valx.i_int < (int)p_vout->output.i_width/VIS_ZOOM )
            {
            /* mouse is over visualisation */
                p_vout->p_sys->i_x = __MIN( __MAX( valx.i_int*VIS_ZOOM - v_w/2, 0 ),
                                            p_vout->output.i_width - v_w - 1);
                p_vout->p_sys->i_y = __MIN( __MAX( valy.i_int * VIS_ZOOM - v_h/2,
                                        0 ), p_vout->output.i_height - v_h - 1);
            }
            else if( valx.i_int >= 0 && valx.i_int < 80
                && valy.i_int >= (int)p_vout->output.i_height/VIS_ZOOM
                && valy.i_int < (int)p_vout->output.i_height/VIS_ZOOM + 9
                && mouse&MOUSE_CLICKED )
            {
            /* mouse is over the "VLC ZOOM HIDE" text */
                p_vout->p_sys->b_visible = false;
            }
            else if(    (int)p_vout->output.i_height/VIS_ZOOM + 9 <= valy.i_int
                     && valy.i_int <= (int)p_vout->output.i_height/VIS_ZOOM + 90
                     && 0 <= valx.i_int
                     && valx.i_int <=
                     (( (int)p_vout->output.i_height/VIS_ZOOM + 90 -  valy.i_int)
               *( (int)p_vout->output.i_height/VIS_ZOOM + 90 -  valy.i_int))/160 )
            {
            /* mouse is over zoom gauge */
                p_vout->p_sys->i_zoom = __MAX( ZOOM_FACTOR,
                                ( 80 + (int)p_vout->output.i_height/VIS_ZOOM
                                   - valy.i_int + 2) * ZOOM_FACTOR/10 );
            }
            else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
            {
                p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
                                      *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
            }
            else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
            {
                p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
                                      *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
            }
        }
        else
        {
            if( valx.i_int >= 0 && valx.i_int < 80 && valy.i_int >= 0
                && valy.i_int <= 10 && mouse&MOUSE_CLICKED )
            {
            /* mouse is over the "VLC ZOOM SHOW" text */
                p_vout->p_sys->b_visible = true;
            }
            else if( mouse&MOUSE_MOVE_X && !(mouse&MOUSE_CLICKED) )
            {
                p_vout->p_sys->i_x -= (newval.i_int - oldval.i_int)
                                      *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
            }
            else if( mouse&MOUSE_MOVE_Y && !(mouse&MOUSE_CLICKED) )
            {
                p_vout->p_sys->i_y -= (newval.i_int - oldval.i_int)
                                      *ZOOM_FACTOR/p_vout->p_sys->i_zoom;
            }
        }
    }

    p_vout->p_sys->i_x =
         __MAX( 0, __MIN( p_vout->p_sys->i_x, (int)p_vout->output.i_width
         - (int)p_vout->output.i_width*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));
    p_vout->p_sys->i_y =
         __MAX( 0, __MIN( p_vout->p_sys->i_y, (int)p_vout->output.i_height
        - (int)p_vout->output.i_height*ZOOM_FACTOR/p_vout->p_sys->i_zoom - 1 ));

    p_vout->p_sys->i_last_activity = mdate();
    vlc_mutex_unlock( &p_vout->p_sys->lock );

    return VLC_SUCCESS;
}